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path: root/drivers/media/video/v4l2-ioctl.c
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Diffstat (limited to 'drivers/media/video/v4l2-ioctl.c')
-rw-r--r--drivers/media/video/v4l2-ioctl.c64
1 files changed, 57 insertions, 7 deletions
diff --git a/drivers/media/video/v4l2-ioctl.c b/drivers/media/video/v4l2-ioctl.c
index db6ec3868347..3e6b6fa5771a 100644
--- a/drivers/media/video/v4l2-ioctl.c
+++ b/drivers/media/video/v4l2-ioctl.c
@@ -24,6 +24,7 @@
#include <media/v4l2-ctrls.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>
+#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>
#define dbgarg(cmd, fmt, arg...) \
@@ -538,6 +539,7 @@ static long __video_do_ioctl(struct file *file,
struct video_device *vfd = video_devdata(file);
const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
void *fh = file->private_data;
+ struct v4l2_fh *vfh = NULL;
struct v4l2_format f_copy;
long ret = -EINVAL;
@@ -553,6 +555,43 @@ static long __video_do_ioctl(struct file *file,
printk(KERN_CONT "\n");
}
+ if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
+ vfh = file->private_data;
+
+ if (vfh && !ops->vidioc_s_priority) {
+ switch (cmd) {
+ case VIDIOC_S_CTRL:
+ case VIDIOC_S_STD:
+ case VIDIOC_S_INPUT:
+ case VIDIOC_S_OUTPUT:
+ case VIDIOC_S_TUNER:
+ case VIDIOC_S_FREQUENCY:
+ case VIDIOC_S_FMT:
+ case VIDIOC_S_CROP:
+ case VIDIOC_S_AUDIO:
+ case VIDIOC_S_AUDOUT:
+ case VIDIOC_S_EXT_CTRLS:
+ case VIDIOC_S_FBUF:
+ case VIDIOC_S_PRIORITY:
+ case VIDIOC_S_DV_PRESET:
+ case VIDIOC_S_DV_TIMINGS:
+ case VIDIOC_S_JPEGCOMP:
+ case VIDIOC_S_MODULATOR:
+ case VIDIOC_S_PARM:
+ case VIDIOC_S_HW_FREQ_SEEK:
+ case VIDIOC_ENCODER_CMD:
+ case VIDIOC_OVERLAY:
+ case VIDIOC_REQBUFS:
+ case VIDIOC_STREAMON:
+ case VIDIOC_STREAMOFF:
+ ret = v4l2_prio_check(vfd->prio, vfh->prio);
+ if (ret)
+ goto exit_prio;
+ ret = -EINVAL;
+ break;
+ }
+ }
+
switch (cmd) {
/* --- capabilities ------------------------------------------ */
@@ -579,9 +618,12 @@ static long __video_do_ioctl(struct file *file,
{
enum v4l2_priority *p = arg;
- if (!ops->vidioc_g_priority)
- break;
- ret = ops->vidioc_g_priority(file, fh, p);
+ if (ops->vidioc_g_priority) {
+ ret = ops->vidioc_g_priority(file, fh, p);
+ } else if (vfh) {
+ *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
+ ret = 0;
+ }
if (!ret)
dbgarg(cmd, "priority is %d\n", *p);
break;
@@ -590,10 +632,13 @@ static long __video_do_ioctl(struct file *file,
{
enum v4l2_priority *p = arg;
- if (!ops->vidioc_s_priority)
- break;
+ if (!ops->vidioc_s_priority && vfh == NULL)
+ break;
dbgarg(cmd, "setting priority to %d\n", *p);
- ret = ops->vidioc_s_priority(file, fh, *p);
+ if (ops->vidioc_s_priority)
+ ret = ops->vidioc_s_priority(file, fh, *p);
+ else
+ ret = v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
break;
}
@@ -2138,13 +2183,18 @@ static long __video_do_ioctl(struct file *file,
}
default:
{
+ bool valid_prio = true;
+
if (!ops->vidioc_default)
break;
- ret = ops->vidioc_default(file, fh, cmd, arg);
+ if (vfh && !ops->vidioc_s_priority)
+ valid_prio = v4l2_prio_check(vfd->prio, vfh->prio) >= 0;
+ ret = ops->vidioc_default(file, fh, valid_prio, cmd, arg);
break;
}
} /* switch */
+exit_prio:
if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
if (ret < 0) {
v4l_print_ioctl(vfd->name, cmd);

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